Improvement in knitting-machines



2 Sheets-Sheet 2.

0. TWUMB'LY. Knitting-Machines.

Patented August 12, 1873.

TMUHTWa/M ZV neww.

UNITED STATES ORISON TWOMBLY, OF ASHLAND, NEW HAMPSHIRE.

IMPROVEMENT IN KNlTTlNG-MACHINES.

Speccation forming part of Letters Patent N o. 141,836, dated August 12, 1873 5 application filed May 16, 1873.

lo all whom t may concern:

Be it known that I, OElsoN TWOMBLY, of Ashland, of the county of Grafton and State of New Hampshire, have invented an Improved Rotary Knitting-Machine 5 and do hereby declare the same to be fully described in the following specification'and represented. in the accompanying drawings, of which- Figure l is a top view, Fig. 2 a front elevation, and Fig. 3 a transverse section, of said machine; Fig. 4, a top view of the stationary needle-wheel, exhibiting its radial and circular grooves; and Fig. 5, an under-side view of the rotary cam-wheel and its needlesupporting flan ge, to be hereinafter described.

The machine, as constructed, is very simple, and is designed for the production of a tube of what is termed plain7-w01k knitting. In the drawings, A denotes a short vertical shaft, surmounted by a cap, c, and provided at its lower end with a male screw, b, to screw into one end of a V-shaped supporter, B, furnished at its other end with jaws c d and a clamp-screw, c, arranged as represented, and bent at its middle, as seen at f. This mode of. constructing the supporter admits of its being clamped to a table or bench, and of the Work or knit tube readily passing from the machine as the knitting progresses. It is also advantageous in other respects. A disk or wheel, (l, arranged coneentrically upon and fixed to the shaft A, so as to be stationary therewith, has itsupper surface provided with a series of radial grooves, g, and also a circular groove, h, all being arranged as shown. 'Ihe radial grooves are to carry and support a series of hooked needles, one of which is shown in Fig. 3. Over the wheel C, and applied to the shaft A so as to be capable of being freely revolved thereon, is the cam-wheel D, which is furnished with a circular or areal flange, c', which projects down from the cam-wheel into the groove It of the needle-wheel, and bears upon the needleshanks, serving to prevent the needles from being tipped upward while being retracted.

In the lower face of the cam-wheel there `is a cam-groove, k, suitably formed, for imparting to each of the needles, at proper times, its necessary forward and back movements and period of rest, in order that it may perform its oiiice of making the stitches. The parts marked l and m are separate from the camyvheel, and Xed thereto by screws, that of the part l going' through a slot in the wheel,

such as will admit of the part Z being moved and adjusted for varying the degree of advance movement of the needle. The eamwheel D is furnished with a crank, E, for revolving it by manual power 5 or it may have a range, n, of gear-teeth, by which it may be operated automatically by a pinion. Besides the circular or areal iiange, the said cam-wheel D is furnished with two spur-wheels, F G, a -yarn-guide, H, a bobbin-carrier, I, and a tension-wire, K, all combined and arranged with it, and constructed as represented.

The yarn from the bobbin L supported 011 the carrier I is to be led through the eye of the tension-wire K, and, after being wound one or more times about the wire, is to pass through the eyero of the guide H, and thence to the needles. The spur-wheels F G revolve freely on stationary pivots, and serve to support the work while the needles may be advancingthrough the loops. rIhe periphery of the needle-wheel serves to support the work while the needles are being drawn back out the loops. v

I claim in the said machine as follows-that is to say:

The shaft A, radially and eircularly grooved needle-wheel C, camwhee1 D, flange t', and the spur-wheels F Gr, yarn-guide H, bobbincarrier I, and tension-wire K, all arranged, combined, constructed, and operating, in connection with a series of knitting-needles, substantially as described. y

ORISON TWOMBLY.

Witnesses:

R. H. EDDY, S. N. PIPER. 

